Automatic plate valve



Patented Nov. 16, 1926. i I UNITED STATES PATENT OFFICE.

JOHANN HEINRICH HERMANII VOSS, OF PALISADES PARK, NEW JERSEY, ASSIGNOB TWORTHINGTON"PUMP AND MACHINERY CORPORATION, A CORPORATION OF" VIRGINIA.

AUTOMATIC PLATE VALVE.

Application filed December 8, 1919. Serial No. 343,379.

My invention relates to automatic plate a flat section bow spring or anyadaptable valves, in which the valve plate consists of spring. a simplestrip-shaped plate or ribbon of For this purpose I mount the valve plateconstant section and shaped ends which lie on the valve seat so that, byits upturned extended on the valve seat, is weakened ends, it issuspended, and sidewise and so neither by holes nor slots, and is openedby lengthwise guided in open rectangular stalls the flowing medium andclosed by its own formed in the cap or arrester, or in a conelasticityor by means of a spring or springs veniently shaped holder attached tothe seat, pressing on the plate. and so that it moves snugly within thede- In ordinary plate valves of this type the sired limits, beingsupported on large bear- 5 strip-shaped plate is either attached at oneing surfaces at all sides; the upturned ends end and the other end ismovable longitudiof the valve plates may be resilient or rigid. nally toenable the plate to bend upward, Further purposes of my invention willor the valve strip is unattached and the appear in the specification andare specificalstrip bends upward unrestrained, the valve ly pointed outin the accompanying claims. strip being guided in slots and recessesReferring to the drawings, in which like formed in the valve seat andthe cap or parts are similarly designated arrester. In such valves, whenmoving, one Figure l is a plan view of an assembled end of the valveplate or both bear down valve; Figure 2 is a section of Figure 1 on 0 onthe valve seat supporting themselves on the line IIII showing the closedposition a thin line or on an edge. In some cases the of a single stripvalve and the arched cap strip-shaped plate is lifted bodily andsection; Figure 3 is a section of Figure 1 on squarely from the seateither with or withthe line II-II showing the open position of outbending and guided together with a a single strip valve and the archedcap 25 superposed fiat section bow spring in a flow section; Figure 4 isa section of Figure 1 hole drilled in the arrester at the end of the onthe line IIIIII; Figure 5 is 'an end late. View of Figure 1; Figure 6shows a longi- These and similar methods of bending and tudinal sectionthrough a valve with a guiding the strip-shaped valve plate havesuperposed bow spring and straight cap sec- 30 the drawback that nosubstantially dimcntion; Figure 7 shows a longitudinal section sionedsurfaces are-provided at the places through another form of single stripvalve of contact of the moving valve strip and the with backing springsimbedded in the straight seat or thecap. The contact between the capsection; Figure 8 shows a transverse secvalve strip and the seat, thecap or the guide tion of Figure 7 on the line VII-VIl:

is merely on a thin line or on an edge and Figure 9 is a longitudinalsection of a modiin some cases there may be wear by friction fied singlestrip valve in closed position and scraping especially if accelerated bywith endwise pivotal holders and without the effect of grit and dirtaccumulating in cap; Figure 10 shows the same valve as in the guidingrecesses and slots. Figure 9 but in flexed. open position; Fig- 4! Theobject of my invention is to provide ure 11 is a transverse section of.Figure 10 '95 a plate Valve to which the above described on the lineX-X; Figure 12 is a modified defects are not attached and which can beform of the valve shown in Figures 9, 10 of two forms so as to act intwo ways. and 11 and shows an elastic, arched bolster First, by being,on opening, partways lifted in place of the cap and the valve strip in 4ofl its seat, then bent upward on a uniform closed position.

bending line by the flowing medium so as In Figures 1, 2, 3, 4 and 5 Ihave shown not to bear its ends on the valve seat for ribbon valves 5housed between the seat 2 support; on closing, by being straightened andthe arched cap section 3. The ends of up on release of the bendingpressure and the valve plates 5 are bent upward at an being finallyseated by the vibratory swingangle of about 90 degrees with an ample 1%ing motion resulting at the end of the bending radius at the corners.The upstraightening movement of the valve strip. turned ends of thevalve strip are guided Second, by being lifted bodily and equallylongitudinally. transverselyand vertically in by the flowingmedium'throughout its enopen stalls 8 formed in the cap section and 55tire length and closed by means of either which .have their corners 9rounded so as to correspond with the curvature of the ends of the valvestrips 5. Guided in the manner shown, the valve plates 5 are kept inproper working position over the How slots 4 located in the seat 2,opening and closing between the flow passages 10 formed in the cap 3 inparallel but staggered arrangement to the portslots it. It will beobserved that the cap 3 is kept at a certain distance from the seat 2 bymeans of distance rings 11 so that the valve strip 5 is lifted paralleloff its seat until it strikes against the rounded corners 9 and thenonly bends uniformly into the how 18 of the arched wall section 12. Theposition shown in Figure 3 shows that, when open, the valve strip 5 doesnot touch the seat but is held up by the fluid pressure and clings tothe curvature 18 of the cap 3, its upturned ends oscillating slightly,with the bending of the plate 5, being embraced and guided within thewalls of the open stall 8. When closing the valve plate returns first tothe straight fiat position and by force of its inertia swings toward theseat witlrits center part and closes finally with a gliding motionstarting from the center and seating without return action known aschattering. As thus housed between the cap and the seat, the valve plateis so guided that there is no edge or thin line contact of the valveplate with the seat such as would cause scraping. There is no recess orcorner to accumulate any matter liable to cause obstruction and the gasflows both in an upward and sideways direction away from the flow slots4, unhindered by side walls or recesses.

In Figure 6 I have shown a valve strip 5 with upturned ends and aninterposed fiat section bow spring 6 having its ends turned upward inthe same manner as the valve strip 5 but so dimensioned that the spring6 is located within the upturned ends of the valve plate 5, thecurvatures of the stall corners 9 and of the ends of the bow spring .6and the plate 5 being amply dimensioned and fitting into each other withenough play between them so that no strain results from the elongationof the spring 6 when in the straight flat position. The cap 3 is kept atthe desired distance from the seat 2 by distance rings 11 and heldtogether with bolts in the same manner as shown in Figures 1 to 5. Thevalve plate 5 and its seating spring 6 are both guided in threedirections by means of the upturned ends fitting into the open stalls 8of the cap 3. There is no contact on an edge or a thin line. Obviouslythe upturned endsof the plate 5 and the spring 6 keep the member onwhich they are formed from tilting at all times, thus making the valveplate independent of the, flat bow spring to keep it from tilting. Inthe case of the Figure 6 the valve plates 5 may be so thin as to bendwhen opening and the spring 6 may be so dimensioned as to bend onlyenough so as to keep the ends of the plate 5 away from the seat. when inopen position or the principal bending may be done by the spring."

The valve shown in Figures 7 and 8 comprises the use of backing springs7 which are imbedded in trenchlike grooves 13 with adjacent recesses 20located in the wall section 12 of the cap 3. These springs are of the:"ame type and are here used for the same purpoi'e as I have shown andclaimed in my Patent No. 1,343,534. The valve strip 5 is guided with itsupturned ends in the open stalls S. In opening the valve 5 is liftedsquarely and equally along its entire length off its seat 2 over theflow slot. 4, gliding on substantial surfaces. During the openingmovement the helical springs 7 retreat into the trenchlike grooves 13.Kinking and tilting is effectually prevented by the sidewise guidance ofthe upturned ends in the open stalls 8 and as there is no contact on ascraping edge or on athin line the guiding effectively prevents catchingof the plates, making the valve especially valuable for high speedoperation above 200 revolutions per minute.

In the foregoing Figures 6, 7 and 8, both the seat section 2 and the capsection 3 have their passage slots 4 and 10 respectively terminating inplane surfaces which are kept at a certain distance from each other bythe rings 11 to afford an adequate lift to the valve plates 5. There areno guiding recesses, chambers or drilled flow passages on any of theparts of the valves under this invention. All parts are or may be simplecastings easily manufactured by the simplest machining processes andaffording the most ready and easy passage 'for the flowing medium allaround the valve plate in upward and sideward direction. Furthermore itis observed that in all valves shown in Figures 1 to 8 the assembling isfacilitated to a larve degree as the valve strips 5 are readily placedinto the open stalls 8 of the cap 3 then the seat 2 is easily located inthe right position on top and the whole, the rings 11 being interposed,clamped together with the bolts 1. This facility in assembling isespecially desirable when adjustments are made outside of the producingworkshop and where no special assembling tools or fixtures areprocurable.

The valve shown in Figures 9. 10 and 11 has its ends turned upward andbent to an approximate circular shape fitting around pivots or arbors 14located near the ends of the flow slots 4 of the seat 2. The pivots 14are conveniently formed by turning them into a rectangular guard 17 madeof steel or other appropriate material of somewhatlarger side dimensionthan the diameter of the pivot so that by turning the pivot from thefull material, side surfaces 15 are formed which serve to guide the endsof the plates 5 as in open stalls in the same manner as shown in thepreceding figures. The distance of the lowest point of the pivot fromthe seat is so dimensioned as to allow free-. dom of action and afford acertain initial lift to the valve plate 5. When open the, valve plate isunrestricted by a cap, merely being held by the ends fitting around thepivots 14. In shaping the ends of the valve plate to fit the pivots adouble curvature is given them to allow for a small initial lift whichkeeps the valve, when open, from contact with the seat. When closed theupper part of the pivot 14 contacts with the valve plate, when open, thelower part of 14 contacts with the valve plate, the ends of which aretightly pressed against the pivot by the fluid pressure. In allpositions the 'valve strip 5 is sidewise and lengthwise guided by theside surfaces 15 and by the pivots 14.

In Figure 12 I show a valve strip 5 that is mounted in a similar manneras the one in Figures 9 and 10 but with an elastic bolster or keeper 16interposed between the valve strip 5 and the pivots 14. The bolster 16is shaped like a bow and its ends cling snugl around the pivots 14. Itis madeof a resi ient but stronger material than the valve plate so asto yield only slightly when the open valve strip 5 presses against it.The ends of the valve plate 5 are shaped around the outer diameter ofthe ends of the bolster 16, a double curvature being given to the endsto afford them freedom of action in lifting the valve strip initially tokeep it from contact with theseat when moving.

Also in the valves shown in Figures 9, 10, 11 and 12 assembling is verysimple as the shaped ends of the plates 5 are readily placed around thearbors 14 which are then bolted to the seat2 by means of bolts 1 andkept in position by dowels 19.

In all cases illustrated in the figures it is observed that in plate orribbon'valves according to thistinvent-ion the egress. of the fluid isgreatly facilitated and proceeds to all sides of the valve plate withpractically equal velocity there being no recesses, side walls orenclosed chambers forcing an ab:

rupt stop or change of direction of the fluid. The absence of side wallsand the fact that the fluid can escape to all sides in upward andsideward direction effectually prevents wire-drawing and itsundesirablereaction on the valve plate.

The arrangement of the elastic valve plates and springs obviously mayvary from the types shown in the different figures. M The valve platemay bend on a uniform bending line or be lifted equally and parallel asits seat within the broader features of the invention. Seating springsof the type shown, or additional or different springs, may be used, butit is desirable that in all cases the plates are guided by their shapedends and that there is no contact on an edge or a thin line between thevalve plates and the seat, and it will be understood that variouschanges, substitutions and modifications may be made in size andarrangement ofthe parts without departing from the invention asspecified in the following claims.

plates from edge contact with the seat section.-

' 2. A plate or ribbon valve comprising a ported seating section, a capsection secured to said seating section, a valve plate having its endsturned away from the seating section and moving in an open spaceterminating in'open rectangular slots at the ends of the cap section ata distance from the seating section to allow thevalve plate to freelybend in the center with its ends out of contact with. the valve seat. I

3. A plate or ribbon valve comprising a ported seating section, a casection secured to said seating section wit an open space between them,a valve plate having its ends turned away from the said seating sectionand moving in an open space terminating in open rectangular slots at theends of the cap section shaped to guide the said valve plate over itsport and. allow the ends of the valve plate to oscillate when the valveplate bends. i v

4. A plate or ribbon valve comprising a seating section, and ancap-.section..-spaced apart, a port in said seating section, astripshapedspring pressed valve plate disposed between said sectionsclosing said port having ends turned away from said seating section. andembraced by open rectan lar guide slots formed at the ends of sai capsectiom v,

5. A plate or ribbon valve comprising a seating section and a capsection spaced apart,a port in said seating section, a stripshaped'valve plate and rposed flat section' bow spring both having their endsin contact and turned away from said seating section and embraced byopen rectangular guideslots formed at the ends of said cap section. 6.The combinat on with a valve seat having one or more ports, of a thinelastic plate for each port free to lift and bend uniformly to open andclose the port and'having its ends bent away from the valve seat toavoid an edge in contact with the seat, and an abutment for the valvehaving curved surfaces coacting with curved portions joining the valveand its bent ends in the bending movement of the valve.

7. The combination with a valve seat having one or more ports, of a thinelastic plate for each port free to lift and bend uniformly to open andclose the port and having its ends bent away from the valve seat toavoid an edge in contact with the seat, and an abutment for the valvehaving curved sur- 15 to lift bodily for bending with its ends out 20 ofcontact witl1-tl1e seat.

In testimony whereof I have hereunto set my hand.

' JOHANN HEINRICH HERMANN V055.

